Fountain pen



Nov. 4 1924. 1,513,894

M. R. CROSSMAN FOUNTAIN PEN Filed June 23, 1922 Fig.1.

V/l/IIIII/l/I/l,

Fig.4 Fig. 6. 15

7 AVE 9 Invenror.

Mclrh'n R. Cros man 2. ,agdmf Mi AHyS.

Patented Nov. 4, 1924.

UNITED STATES MARTIN R. CROSSMAN, OF BOSTON, MASSACHUSETTS.

FOUNTAIN PEN.

Application filed June 23, 1922.

To all whom it may concern:

Be it known that I, MARTIN R. CROSSMAN, a citizen of the United States, and resident of Boston, county of Suffolk, State of Massachusetts, have invented an Improvement in Fountain Pens, of which the following description, in connection with the accompanying drawing, is a specification, like characters on the drawing representing like parts.

This invention relates to fountain pens and'has for one of its objects to provide a novel fountain pen; which will not flood even when the ink in the barrel is nearly used up, and another object of the invention is to provide a novel attachment which can be applied to an ordinary fountain pen to render it non-flooding.

My improvement consists in a plug inserted in the inner end of the nozzle portion of the pen directly in the rear of the feed bar but arranged so as to form, an auxiliary chamber between the plug and the feed bar. The plug has a small duct which forms a communication between the auxiliary reservoir and the barrel of the pen and through which the ink flows from the barrel to the auxiliary reservoir and from there to the pen point. I find that by providing this auxiliary reservoir a regular flow of ink tothe pen point is secured even clear to the last drop and there is no dis agreeable flooding of the pen when the latter is nearly empty.

In order to give an understanding of the invention I have illustrated in the drawings a selected embodiment thereof which will now be described after which the novel features will be pointed out in the appended claim.

Fig. 1 is a sectional view of a fountain pen showing one embodiment of my invention.

Fig. 2 is a similar View showing a different embodiment.

Fig. 3 is a similar view showing still another embodiment.

. Fig. 4 is a section on the line 4-4, Fig. 1.

Fig. 5 is a perspective view of the inner end of the feed bar.

Fig. 6 is a section on the line 66, Fig. 1.

Fig. 7 is a perspective view of the fin 14.

Fig. 8 is a section on the line 88, Fig. 3.

Figs. 9 and 10 show different forms of the invention.

Seriail No. 570,423.

Referring to Fig. 1, 1 indicates a portion of the barrel of a fountain pen which is internally screw-threaded at its end as shown at 2 to receive the end of the separable section 3 that carries the pen point 4 and feed bar 5. The feed bar 5 is of the usual construction and extends into one end of the separable section 3 and is provided with the feed duct 6 underneath the pen point 41.

My invent-ion comprises a plug which is fitted into the inner end of the separable section 3, said plug forming between itself and the feed bar 5 an auxiliary ink reservoir.

In the construction shown in Fig. 1 a tubular member 7 is employed which is open at one 'end and is closed at the other end by a plug 8, the latter being provided with a feed groove 9. The open end of the tubular member 7 is inserted into the inner end 10 of the separable section 3 thereby forming an auxiliary ink reservoir 11 between the plug 8 and the feed bar 5. This auxiliary ink reservoir has communication with the main ink reservoir 12 of the barrel through the duct 9, and if desired I may provide an additional port or duct 13 through the tubular member adjacent the inner end of the separable section 3. When the pen is in use the ink from the main reservoir 12 will flow into the auxiliary reservoir 11 from which it will flow to the pen point through the feed duct 6. The presence of this auxiliary reservoir maintains a limited supply of ink closely adj a cent the pen point so that the pen will always fiow freely and by reason of this construction the danger of the flooding of the pen when the ink in. the main reservoir is nearly exhausted is largely eliminated.

It will .be noted that the tubular member 7 extends into the main reservoir 12 and the port 13 provides for draining all the ink from the main reservoir into the auxiliary reservoir.

I may, if desired, employ a fin 14 within the tubular member 7, the latter extending nearly to the inner end of the feed bar. This fin forms a lead or guide for conducting the ink to the feed when the pen is used. The fin 14 is provided at one end with a slot 18 and at the other end with a slit 19.

The feed bar is shown as having the slot 15 in its end.

In Fig. 2 I have shown an embodiment where inserted directly into the inner end 10 of the separable section 8. In

this case the plug is indicated at 16 and is provided with a duct "17- through which inking pens In this construction the barrel 1 has within it a collapsible sack 20 to contain the ink, said sack being secured to the reduced end 21 of; the removable section 3, and the latter having the portion 22 set into ithe end of the barrel 1 and held therein frictionally'. 1

In-this embodiment of the invention a plug is used at-theinnerend of the separable section 3, said plug forming an auxiliary reservoir 24 between itself and the end of the feed bar 5. The plug 23 is provided with aslot 25; f0rmi'ng a duct to feed the ink from-thewsack 20 to the reservoir 2&, and I may, if desired, provide the plug 23 with pro e ion 2 extending A from opposite sidesvthereoii one projection extending into the auxiliary reservoir 24 and the other into the; main reservoir Within the sack 20.-

These projections serve to assist in guiding and feeding the ink through the. duct.

ln all embodiments of the invention a plug separatefrom the feed bar iscarried at the innerend of. the separablesectiont-said plug forming between itself and the feed b ar an. auxiliary ink reservoir which has appropriate communication'with the main reservoir.

In Figs. 9 and 10 I have shown a slightly different embodiment of the invention wherein the spiral feed element 27 is employed instead of "the fin 14. This spiral feed element is inserted into the open end ofthe tube 7 and extends into the auxiliary reservoir. It constitutes a guide to assist the flow of theink to the feed bar.." In' Fig. 10 the construction is shown wherein the feed opening-13 is situatedadj acent the plug 8 and the latter is formed 28 to assist the flow of ink.

I claim. v N y In a fountain pen,'the combination with a barrel having a main ink reservoir' of a separable section detachable from thehb'arrel, a pen point and a feed bar carriedby the outer end of said separable-section and a cup-shaped plug having its open end inserted into the inner end of the separable section andits closed end projecting into the main ink reservoir, said pl ug forming with the separable section an auxil ary .ink reservo-lr, the wall of sald plug having alateral opening ata point beyond the separable section which forms a communication between the main ink reservoir and the chamber withinthe hollowtplug. Y i In testimony whereof, I have signed my name to this specification. v. v

MARTIN R. CROSSMAN.

with the gouge 

